<template> 
    <el-container class="home-contain">
        <!--头像区域---->
        <el-header>
            <div>
                <img src="../assets/img/head.png" alt="">  
            </div>
            <span class="topic">电商后台管理系统</span>
            <el-button type='info' @click="logout">退出</el-button>
        </el-header>
        <!--主体区域-->
        <el-container>
            <!--侧边栏-->
            <el-aside :width="isCollapse ? '64px':'200px' " >
                <div class="toggle-button" @click="toggle">|||</div>
                <!--侧边栏菜单区域-->
                <el-menu
                    unique-opened :collapse="isCollapse"
                    class="el-menu-vertical-demo"
                    background-color="#545c64"
                    text-color="#fff"
                    active-text-color="bisque"
                    :unique-opened="true"
                    router 
                    default-active="/users">
                    <!--一级菜单-->
                    <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id" >
                        <!--一级菜单的模版区域-->
                        <template slot="title">
                        <!--图标-->
                        <i :class="iconsObj[item.id]"></i>
                        <!--文本-->
                        <span>{{item.authName}}</span>
                        </template>
                       <!--二级菜单-->
                        <el-menu-item 
                        :index="'/'+subItem.path" 
                        v-for="subItem in item.children" 
                        :key="subItem.id"
                        @click="saveNavState('/'+subItem.path)"
                        >
                            <!--一级菜单的模版区域-->
                            <template slot="title">
                            <!--图标-->
                            <i class="el-icon-menu"></i>
                            <!--文本-->
                            <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <el-container>
            <!--右侧内容主体-->
            <el-main>
                <!--路由占位符-->
                <router-view></router-view>
            </el-main>
            <el-footer>Footer</el-footer>
            </el-container>
         </el-container>
    </el-container>
</template>

<script>
    export default{
        data(){
         return{
            //左侧菜单数据
            menulist:[],
            iconsObj:{
              '125':'iconfont icon-user',
              '103':'iconfont icon-tijikongjian',
              '101':'iconfont icon-shangpin',
              '102':'iconfont icon-danju',
              '145':'iconfont icon-baobiao',
            },
            //是否折叠
            isCollapse:false,
            //被激活的链接地址
            activePath:''
         }
        },
        created(){
            this.getMenuList()
            this.activePath=window.sessionStorage.getItem('activePath')

        },
        methods: {
            logout(){
                window.sessionStorage.clear();
                this.$router.push("/login")
            },
            //获取所有的菜单
           async getMenuList(){
            const {data:res} = await this.$http.get('/menus')
            if(res.meta.status!==200)return this.$message.error(res.meta.msg)
            this.menulist=res.data
            },
            //点击按钮切换折叠和展开
            toggle(){
                this.isCollapse=!this.isCollapse
            },
            //保存链接的激活状态
            saveNavState(activePath){
                window.sessionStorage.setItem('activePath',activePath)
            }
    }  
    };
</script>

<style lang="less" scoped>
.el-header{
    background-color:dimgray;
    display: flex;
    justify-content:space-between;
    padding-left: 0;
    // align-items: center;
    color: white;
    font-size: 30px;

    img{
            width: 100%;
            height: 100%;
            border-radius: 90%;
            background-color: bisque;
        }
    span{
        width: 100%;
    }
}
.el-aside{
    background-color:#545c64;
    .el-menu{
        border-right: none;
    }
}
.el-main{
    background-color:white
}
.el-footer{
    background-color:dimgray;
}
.home-contain{
    height: 100%;
}
.iconfont{
    margin-right:16px;
}
.toggle-button{
    background-color: #4a504a;
    font-size: 20px;
    line-height: 34px;
    color: blanchedalmond;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>